APA (7th ed.) Citation

Newell, N. D., Chronic, J., & Roberts, T. G. (1949). Upper Paleozoic of Peru. Univ. Service Bureau, Columbia Univ.

Chicago Style (17th ed.) Citation

Newell, Norman D., John Chronic, and Thomas Glasdir Roberts. Upper Paleozoic of Peru. New York: Univ. Service Bureau, Columbia Univ, 1949.

MLA (9th ed.) Citation

Newell, Norman D., et al. Upper Paleozoic of Peru. Univ. Service Bureau, Columbia Univ, 1949.